Jet ski



FIG. 1 is a top and front perspective view of a jet ski showing my new design;

FIG 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof, the opposite side elevational view being a mirror image of that shown; and 

The ornamental design for a jet ski, as shown and described. 